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Natural altitudinal range from 450 to 1,500 m. Three natural types: - High Tatra, - Central Mountain and Basin, - Eastern Slovakian. The edaphotypes of a „white larch“ (fixed to limestone sites) and „black larch“ (acidic substrates) considered but not proved experimentally. >>> different deployment areas according to the parent substrate on which source populations grow. „Basin“ climatype better adapted to sites with late frosts confirmed by experiments instead.

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Larix decidua – seeds and plants Seeds Year Region of provenances Total Seeds [in kg] Year Region of provenances Total Inventory of plants [in pieces] Year Age of plants [in years] 12345Total Reforestation [in pieces] Year Age of plants [in years] 12345Total

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Results/Experience: Western Carpathian provenances are very adaptable, maybe except of those from High Tatras. The phenotypic quality of local provenances is very good. Jeseniky (Sudetic) larch may grow better in lower altitudes. Experiment starting: Phenological responses on the effects of nursery cultivation and subsequent transfer into very contrasting site conditions.

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Progeny testing: Progeny testing of 3 clonal seed orchards with 3 testing plots located within the range of the source populations. - Definition of a deployment area /size of breeding zone (2 nd ) generation seed orchard(s). Small experiment with species hybridization and testing hybrid progenies: Hybrids belonging to 11 species combinations were obtained from 45 crosses. Research support: Flowering phenology, mating system and gene flow in a seed orchard. Genetic makeup of the orchard progenies (PhD. studies).